Compatibility disclaimer This is an international, 100% factory unlocked model and compatible to GSM networks. It can be used with any GSM network around the world that matches the bands supported by the phone. Please check with your mobile carrier to make sure the phone bands is compatible with your network provider of your choice. Introducing Galaxy S21 Ultra 5G. Designed with a unique contour-cut camera to create a revolution in photography — letting you capture cinematic 8K video and snap epic stills, all in one go.